[PATCH 08/17] ArmPkg/SemiHostingDebugLib: Add a new api DebugVPrint

[Zhichao Gao <zhichao.gao@intel.com>]

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=1395

Add a new api DebugVPrint implementation in the
DebugLib instance. This api would expose a print
routine with VaList parameter.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Zhichao Gao <zhichao.gao@intel.com>
Cc: Leif Lindholm <leif.lindholm@linaro.org>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Liming Gao <liming.gao@intel.com>
Cc: Sean Brogan <sean.brogan@microsoft.com>
Cc: Michael Turner <Michael.Turner@microsoft.com>
Cc: Bret Barkelew <Bret.Barkelew@microsoft.com>
---
 ArmPkg/Library/SemiHostingDebugLib/DebugLib.c | 41 +++++++++++++++++++++++----
 1 file changed, 35 insertions(+), 6 deletions(-)

diff --git a/ArmPkg/Library/SemiHostingDebugLib/DebugLib.c b/ArmPkg/Library/SemiHostingDebugLib/DebugLib.c
index ec03edb774..e725853c92 100644
--- a/ArmPkg/Library/SemiHostingDebugLib/DebugLib.c
+++ b/ArmPkg/Library/SemiHostingDebugLib/DebugLib.c
@@ -1,7 +1,7 @@
 /** @file
   UEFI Debug Library that uses PrintLib to send messages to STDERR.
 
-  Copyright (c) 2006 - 2007, Intel Corporation. All rights reserved.<BR>
+  Copyright (c) 2006 - 2019, Intel Corporation. All rights reserved.<BR>
   Portions copyright (c) 2008 - 2009, Apple Inc. All rights reserved.<BR>
   This program and the accompanying materials
   are licensed and made available under the terms and conditions of the BSD License
@@ -48,9 +48,41 @@ DebugPrint (
   IN  CONST CHAR8  *Format,
   ...
   )
+{
+  VA_LIST         Marker;
+
+  ASSERT(Format != NULL);
+
+  VA_START(Marker, Format);
+  DebugVPrint(ErrorLevel, Format, Marker);
+  VA_END(Marker);
+}
+
+/**
+  Prints a debug message to the debug output device if the specified error level is enabled.
+
+  If any bit in ErrorLevel is also set in DebugPrintErrorLevelLib function
+  GetDebugPrintErrorLevel (), then print the message specified by Format and the
+  associated variable argument list to the debug output device.
+
+  If Format is NULL, then ASSERT().
+  If the length of the message string specificed by Format is larger than the maximum allowable
+  record length, then directly return and not print it.
+
+  @param  ErrorLevel    The error level of the debug message.
+  @param  Format        Format string for the debug message to print.
+  @param  VaListMarker  VA_LIST marker for the variable argument list.
+
+**/
+VOID
+EFIAPI
+DebugVPrint (
+  IN  UINTN        ErrorLevel,
+  IN  CONST CHAR8  *Format,
+  IN  VA_LIST       VaListMarker
+  )
 {
   CHAR8    AsciiBuffer[MAX_DEBUG_MESSAGE_LENGTH];
-  VA_LIST  Marker;
 
   //
   // If Format is NULL, then ASSERT().
@@ -67,14 +99,11 @@ DebugPrint (
   //
   // Convert the DEBUG() message to a Unicode String
   //
-  VA_START (Marker, Format);
-  AsciiVSPrint (AsciiBuffer, sizeof (AsciiBuffer), Format, Marker);
-  VA_END (Marker);
+  AsciiVSPrint (AsciiBuffer, sizeof (AsciiBuffer), Format, VaListMarker);
 
   SemihostWriteString (AsciiBuffer);
 }
 
-
 /**
 
   Prints an assert message containing a filename, line number, and description.
-- 
2.16.2.windows.1